.filter {
  height: 40px;
  &-mask {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, .5);
    z-index: 2;
  }
  &-content {
    position: absolute;
    background-color: #fff;
    left: 0;
    right: 0;
    z-index: 3;
  }
}
